Yes, that's my guess. Remove it and then re-install Office from your media.
If you have the same trouble, you may want to use the manual "complete"
removal steps here, then re-install from your purchased version.

http://support.microsoft.com/kb/928218/en-us

--
mezzodiva

Please reply to the newsgroup so all may benefit.


"JuST Jen" <JuSTJen@discussions.microsoft.com> wrote in message
news:A36EF009-4FF1-4071-A64F-D8D092D4D3C3@microsoft.com...
>A trial version is installed.
> I've already tried to repair windows. No problem was found.
> I tried installing as adminstrator as well.
> Perhaps it is that pesky trial version that is the problem.
>
> "mezzodiva" wrote:
>
>> Do you have any previous versions of Office installed, or was Office 2007
>> Trial or something else previously installed? I'm just wondering if
>> there's
>> something hanging on from a previous installation.
>>
>> My initial thought was a problem in your Vista installation or
>> configuration, since you can install the DVD on another system...Any
>> chance
>> you could try to repair your Windows installation?
>>
>> Do you have administrative rights on the system? Have you tried
>> installing
>> as administrator?
>>
>> --
>> mezzodiva
>>
>> Please reply to the newsgroup so all may benefit.
>>
>>
>> "JuST Jen" <JuST Jen@discussions.microsoft.com> wrote in message
>> news:D1AD4B16-B171-4FE9-83EE-EBA921E2AC8C@microsoft.com...
>> > When installing Office Ultimate 2007 on my Windows Vista Ultimate
>> > system,
>> > I
>> > get the following setup error message very soon after Setup is launched
>> > (and
>> > prior to asking for entry of the key):
>> >
>> > "Setup cannot continue because a required file is either corrupted or
>> > not
>> > available. run Setup again from original source disc or download
>> > location."
>> >
>> > I have already tried copying the CD to a system folder and running
>> > Setup
>> > from that location. I have also tried running Setup in Windows XP
>> > compatibility mode without success. My system has all updates
>> > installed
>> > for
>> > Windows Vista Ultimate. I am able to install other programs on this
>> > system
>> > from the same DVD/CD drive. And, Setup will launch from the CD on
>> > another
>> > system, and gets to the screen that asks for the key entry, so I do not
>> > believe the CD itself is bad.
>> >
>> > Any ideas?
>>
>>
>>